lkml.org 
[lkml]   [2019]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 4/7] iommu/vt-d: Allow DMA domain attaching to rmrr locked device
Date
We don't allow a device to be assigned to user level when it is locked
by any RMRR's. Hence, intel_iommu_attach_device() will return error if
a domain of type IOMMU_DOMAIN_UNMANAGED is about to attach to a device
locked by rmrr. But this doesn't apply to a domain of type other than
IOMMU_DOMAIN_UNMANAGED. This adds a check to fix this.

Fixes: fa954e6831789 ("iommu/vt-d: Delegate the dma domain to upper layer")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reported-and-tested-by: Qian Cai <cai@lca.pw>
---
drivers/iommu/intel-iommu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 5251533a18a4..19c4c387a3f6 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5139,7 +5139,8 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
{
int ret;

- if (device_is_rmrr_locked(dev)) {
+ if (domain->type == IOMMU_DOMAIN_UNMANAGED &&
+ device_is_rmrr_locked(dev)) {
dev_warn(dev, "Device is ineligible for IOMMU domain attach due to platform RMRR requirement. Contact your platform vendor.\n");
return -EPERM;
}
--
2.17.1
\
 
 \ /
  Last update: 2019-06-12 02:36    [W:0.139 / U:2.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site